<?php 
define('DS', DIRECTORY_SEPARATOR); 
date_default_timezone_set("Asia/Shanghai"); 
class FileLoader 
{ 
  //路径变量 
  private $rootdir    = ''; 
  private $tmp      = "tmp";      //tmp 目录 
  private $source     = "mpg";      //source 目录 
  private $destination  = "screenshoot";  //目标截图路径 
  private $emptyImageName = "empty.jpg";   //合成的背景图 
  //文件数组  
  private $maxShoots   = 12;        //最大的截图数 
  private $videoInfo   = NULL; 
  private $files     = array();     //文件数 
  private $fileArray   = array();      
  private $extensionArray = array("mpg","mkv","mp4","avi","3gp","mov");  //支持的格式 
  private $timeArray   = array("00:00:10","00:00:20","00:00:30","00:01:00","00:01:30","00:02:00","00:02:30","00:03:00","00:03:30","00:03:40","00:03:50","00:04:00"); 
  //统计变量 
  private $timeStart   = 0; 
  private $timeEnd    = 0; 
  private $fileCount   = 0; 
  private $successCount  = 0; 
  private $failedCount  = 0; 
   
  /** 
  *  初始化信息 
  */  
   function __construct() 
  { 
    file_put_contents("log.txt",""); 
    $this->rootdir = dirname(__FILE__);   
    $count = count($this->timeArray); 
         
    for($i=1;$i<=$count;$i++) 
    { 
      $ii = $i-1; 
      $this->fileArray[$ii] = $this->tmp.DS.$i.".jpg"; 
    } 
  } 
    
  /** 
  *  当前时间，精确到小数点 
  */ 
  private static function microtime_float() 
  { 
    list($usec, $sec)= explode(" ", microtime()); 
    return ((float)$usec + (float)$sec); 
  } 
   
  /** 
  *  00:00:00 时间转秒 
  */ 
  private static function timeToSec($time)  
  { 
     $p = explode(':',$time); 
     $c = count($p); 
     if ($c>1) 
     { 
        $hour  = intval($p[0]); 
        $minute = intval($p[1]); 
        $sec   = intval($p[2]); 
     } 
     else 
     { 
        throw new Exception('error time format'); 
     } 
     $secs = $hour * 3600 + $minute * 60 + $sec; 
     return $secs;  
  } 
   
  /** 
  *  00:00:00 时间转秒 
  */ 
  private static function secToTime($time)  
  { 
     
    $hour = floor($time/3600); 
    $min = floor(($time - $hour * 3600)/60); 
    $sec = $time % 60; 
    $timeStr = sprintf("%02d:%02d:%02d",$hour,$min,$sec); 
    return $timeStr;    
  } 
    
  /** 
  *  获取全部文件 
  */ 
   private function getFiles($dir) 
  { 
    $files = array(); 
    $dir = rtrim($dir, "/\\") . DS; 
    $dh = opendir($dir); 
    if ($dh == false) { return $files; } 
 
    while (($file = readdir($dh)) != false) 
    { 
      if ($file{0} == '.') { continue; } 
 
      $path = $dir . $file; 
      if (is_dir($path)) 
      { 
        $files = array_merge($files, $this->getFiles($path)); 
      } 
      elseif (is_file($path)) 
      { 
        $files[] = $path; 
      } 
    } 
    closedir($dh); 
    return $files; 
  } 
   
  /** 
  *  搜索路径 
  */ 
  public function searchDir($sourcePath = NULL) 
  { 
     
    $this->timeStart = $this->microtime_float(); 
 
    if ($sourcePath)  
    { 
      $this->rootdir = $sourcePath; 
    }  
     
    if (file_exists($this->rootdir) && is_dir($this->rootdir)) 
    { 
      $this->files = $this->getFiles($this->rootdir.DS.$this->source);       
    } 
   
    $this->fileCount = count($this->files); 
   
    foreach ($this->files as $path) 
    { 
      $fi = pathinfo($path); 
      $flag = array_search(strtolower($fi['extension']),$this->extensionArray); 
      if (!$flag) continue; 
      $this->getScreenShoot(basename($path)); 
    } 
     
    $this->timeEnd = $this->microtime_float(); 
    $time = $this->timeEnd - $this->timeStart; 
     
    if($this->fileCount > 0) 
    { 
      $str = sprintf("[TOTAL]: Cost Time:%8s | Total File:[%d] | Successed:[%d] | Failed:[%d] | Speed:%.2fs per file\n",$this->secToTime($time),$this->fileCount,$this->successCount,$this->failedCount,$time/$this->fileCount); 
      file_put_contents("log.txt",$str,FILE_APPEND);  
    } 
    else 
    { 
      $str = sprintf("[TOTAL]: Cost Time:%8s | Total File:[%d] | Successed:[%d] | Failed:[%d] | Speed:%.2fs per file\n",$this->secToTime($time),$this->fileCount,$this->successCount,$this->failedCount,0); 
      file_put_contents("log.txt",$str,FILE_APPEND); 
    }   
     
  } 
   
  /** 
  *  获取视频信息 
  */ 
  private function getVideoInfo($file){ 
      $re = array(); 
      exec(".".DS."ffmpeg -i {$file} 2>&1", $re); 
      $info = implode("\n", $re); 
       
      if(preg_match("/No such file or directory/i", $info)) 
      { 
        return false; 
      } 
       
      if(preg_match("/Invalid data/i", $info)){ 
        return false; 
      } 
     
      $match = array(); 
      preg_match("/\d{2,}x\d+/", $info, $match); 
      list($width, $height) = explode("x", $match[0]); 
     
      $match = array(); 
      preg_match("/Duration:(.*?),/", $info, $match); 
      if($match) 
      { 
        $duration = date("H:i:s", strtotime($match[1])); 
      }else 
      { 
        $duration = NULL; 
      }   
         
      $match = array(); 
      preg_match("/bitrate:(.*kb\/s)/", $info, $match); 
      $bitrate = $match[1]; 
     
      if(!$width && !$height && !$duration && !$bitrate){ 
        return false; 
      }else{ 
        return array( 
          "file" => $file, 
          "width" => $width, 
          "height" => $height, 
          "duration" => $duration, 
          "bitrate" => $bitrate, 
          "secends" => $this->timeToSec($duration) 
        ); 
      } 
    } 
   
   
   
  /** 
  *  设置截图时间 
  */  
  private function setShootSecends($secends,$useDefault = NO) 
  {   
     
    if($useDefault) 
    { 
      if($secends<18) 
      { 
        $time = 1; 
      }else 
      { 
        $time = 5; 
      }   
       
      $range = floor(($secends - $time)/ ($this->maxShoots)); 
      if ($range < 1)  
      { 
        $range = 1; 
      } 
       
      $this->timeArray = array(); 
      for($i=0;$i<$this->maxShoots;$i++) 
      { 
        $this->timeArray[$i] = $this->secToTime($time); 
        $time = $time + $range; 
        if ($time > $secends) break; 
      } 
    } 
  } 
   
  /** 
  *  拼接图片 
  */ 
  private function getFixedPhoto($fileName) 
  { 
   
    $target = $this->rootdir.DS.$this->emptyImageName;//背景图片 
    $target_img = Imagecreatefromjpeg($target); 
    $source= array(); 
 
    foreach ($this->fileArray as $k=>$v) 
    { 
      $source[$k]['source'] = Imagecreatefromjpeg($v); 
      $source[$k]['size'] = getimagesize($v); 
    } 
 
    $tmpx=5; 
    $tmpy=5;//图片之间的间距 
    for ($i=0; $i< count($this->timeArray); $i++) 
    {   
      imagecopy($target_img,$source[$i]['source'],$tmpx,$tmpy,0,0,$source[$i]['size'][0],$source[$i]['size'][1]); 
      $target_img = $this->setTimeLabel($target_img,$tmpx,$tmpy,$source[$i]['size'][0],$source[$i]['size'][1],$this->timeArray[$i]);   
      $tmpx = $tmpx+ $source[$i]['size'][0]; 
      $tmpx = $tmpx+5; 
      if(($i+1) %3 == 0){ 
        $tmpy = $tmpy+$source[$i]['size'][1]; 
        $tmpy = $tmpy+5; 
        $tmpx=5; 
      } 
    } 
     
    $target_img = $this->setVideoInfoLabel($target_img,$tmpx,$tmpy,$this->videoInfo); 
    Imagejpeg($target_img,$this->rootdir.DS.$this->destination.DS.$fileName.'.jpg');  
  } 
   
  /** 
  *  设置时间刻度标签 
  */ 
  private function setTimeLabel($image,$image_x,$image_y,$image_w,$image_h,$img_text) 
  { 
     imagealphablending($image,true); 
     //设定颜色 
     $color=imagecolorallocate($image,255,255,255); 
     $ttf_im=imagettfbbox(30 ,0,"Arial.ttf",$this->img_text); 
     $w = $ttf_im[2] - $ttf_im[6];  
     $h = $ttf_im[3] - $ttf_im[7];  
     unset($ttf_im); 
      
     $txt_y   =$image_y+$image_h+$h-5; 
     $txt_x   =$image_x+$w+5; 
       
     imagettftext($image,30,0,$txt_x,$txt_y,$color,"Arial.ttf",$img_text); 
     return $image;  
   } 
    
  /** 
  *  设置视频信息标签 
  */ 
   private function setVideoInfoLabel($image,$txt_x,$txt_y,$videoInfo) 
   { 
     imagealphablending($image,true); 
   
     $color=imagecolorallocate($image,0,0,0); 
  
     imagettftext($image,32,0,100,2000+30,$color,"FZLTHJW.ttf","FileName:".basename($videoInfo["file"])); 
     imagettftext($image,32,0,1600,2000+30,$color,"Arial.ttf","Size:".$videoInfo["width"]."x".$videoInfo["height"]); 
     imagettftext($image,32,0,100,2000+120,$color,"Arial.ttf","Duration:".$videoInfo["duration"]); 
     imagettftext($image,32,0,1600,2000+120,$color,"Arial.ttf","Bitrate:".$videoInfo["bitrate"]); 
     return $image;  
  } 
    
  /** 
  *  屏幕截图 
  */ 
  public function getScreenShoot($fileName) 
  { 
    $fi = pathinfo($fileName); 
    $this->videoInfo = $this->getVideoInfo($this->rootdir.DS.$this->source.DS.$fileName); 
    if($this->videoInfo) 
    { 
      $this->setShootSecends($this->videoInfo["secends"]); 
     
      for ($i=0; $i< count($this->timeArray); $i++ ) 
      { 
        $cmd=".".DS."ffmpeg -ss ". $this->timeArray[$i] ." -i ". $this->rootdir.DS.$this->source.DS.$fileName ." -y -f image2 -s 720*480 -vframes 1 ".$this->rootdir.DS.$this->fileArray[$i];   
        exec($cmd,$out,$status);   
      } 
      $this->getFixedPhoto($fileName); 
       
      $str = sprintf("[%s]:OK...........[%s][%2dP]%-30s\n",date("y-m-d h:i:s",time()),$this->videoInfo["duration"],count($this->timeArray),$fileName); 
      file_put_contents("log.txt",$str,FILE_APPEND); 
      $this->successCount += 1; 
    }else 
    { 
      $str = sprintf("[%s]:FAILED.................................[%s][%2dP]%-30s\n",date("y-m-d h:i:s",time()),$this->videoInfo["duration"],count($this->timeArray),$fileName); 
      file_put_contents("log.txt",$str,FILE_APPEND);  
      $this->failedCount += 1; 
    } 
  } 
   
  /** 
  *  TODO: 
  *  截取图片, 
  *  需要配置ffmpeg-php，比较麻烦， 
  *  但是这个类确实挺好用的。 
  */ 
  public function getScreenShoot2($fileName) 
  { 
    if(extension_loaded('ffmpeg')){//判断ffmpeg是否载入  
      $mov = new ffmpeg_movie($this->rootdir.DS.$this->source.DS.$fileName);//视频的路径  
      $count = $mov->getFrameCount(); 
      $ff_frame = $mov->getFrame(floor($count/2));  
      if($ff_frame) 
      { 
        $gd_image = $ff_frame->toGDImage();      
        $img=$this->rootdir.DS."test.jpg";//要生成图片的绝对路径  
        imagejpeg($gd_image, $img);//创建jpg图像  
        imagedestroy($gd_image);//销毁一图像  
      } 
    }else{  
      echo "ffmpeg没有载入";  
    }  
  } 
} 
 
$fileLoader = new FileLoader(); 
$fileLoader->searchDir(); 
?>